<?php
namespace framework\ext;

//xml解析成数组
class Xml
{
    public static function decode($xml)
    {
        $values = array();
        $index  = array();
        $array  = array();
        $parser = xml_parser_create('utf-8');
        xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, 1);
        xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, 0);
        xml_parse_into_struct($parser, $xml, $values, $index);
        xml_parser_free($parser);
        $i = 0;
        $name = $values[$i]['tag'];
        $array[$name] = isset($values[$i]['attributes']) ? $values[$i]['attributes'] : '';
        $array[$name] = self::_struct_to_array($values, $i);
        return $array;
    }
    
    private static function _struct_to_array($values, &$i)
    {
        $child = array();
        if (isset($values[$i]['value'])) {
            array_push($child, $values[$i]['value']);
        }
        
        while ($i++ < count($values)) {
            switch ($values[$i]['type']) {
                case 'cdata':
                    array_push($child, $values[$i]['value']);
                    break;
                
                case 'complete':
                    $name = $values[$i]['tag'];
                    if (!empty($name)) {
                        $child[$name]= ($values[$i]['value'])?($values[$i]['value']):'';
                        if (isset($values[$i]['attributes'])) {
                            $child[$name] = $values[$i]['attributes'];
                        }
                    }
                break;
                
                case 'open':
                    $name = $values[$i]['tag'];
                    $size = isset($child[$name]) ? sizeof($child[$name]) : 0;
                    $child[$name][$size] = self::_struct_to_array($values, $i);
                    break;
                
                case 'close':
                    return $child;
                    break;
            }
        }
        return $child;
    }
}
